Jack.



J. DE H. BUNN. JACK.

APPLIO ATION FILED JUNE 25, 1912. 1,064, 1 9 1 Patented June 10,1913.

3 SHEETSSHEET 1.

- Emma/tow /Ese @Z Jeflarenflann J. DE H. BUNN. JACK.

APPLICATION FILED JUNE 26,1912. 1,064,191

tides 105 Ja/[awnfian n I lm memes Patented June 10,1913.

3 SEEETBSHEET 2.

J. DE-H. BDNN.

Patented June 10, 1913.

n r M Wu H n w e L r m a n M n a S J M *nnrrnn s'rarns TENT JOSEPH DEHAVEN BUNN, OF YORK, PENNSYLVANIA, ASSIGNOR, BY DIRECT AND MESNEASSIGNMENTS, TO HENRY S WIKEL, OF YORK, PENNSYLVANIA.

JACK.

Specification of Letters Patent.

Patented June 10, 1913.

To all whom it may concern:

Be it known that I, Josnrrr Dn HAVEN BUNK, a citizen of the UnitedStates, residing at York, in the county of York and State ofPennsylvania, have invented certain new and useful Improvements inJacks, of which the following is a specification.

My invention relates to improvements in.

jacks and more particularly to an improved construction which is dsigned for elevating automobiles, and other Vehicles and which iscapable of quick operation by one person to lift the vehicle entirelyoff the ground.

A further object is to provide an improved jack which is capable ofadjustment to receive the front and rear axles of any size of vehicle,and which may be packed in a relatively small space when not in use.

With these and other objects in view, the invention consists in certainnovel features of construction and combinations and arrangen'lents ofparts as will be more fully hereinafter described and pointed out in theclaims.

In the accompanying drawings: Figure 1, is a view in elevationillustrating my improvements spread out upon the ground in position toreceive a vehicle positioned over the same. Fig. 2, is a view in sideelevation showing the Vehicle in dotted lines and illustrating the nextstep in the operation of jacking the machine. Fig. 3, is a broken viewin elevation on an enlarged scale showing (he jack in its uprightposition. Fig. 4:, is a plan view of Fig. 3. Fig. 5, is a view inelevation of the rear member partly broken away to illustrate the mannerof ad justing the uprights. Fig. (3, is a View in longitudinal sectionthrough the center of the front member illustrating the manner ofadjusting the same. Fig. 7, is a view in section on the line 77 of Fig.(3, and Fig. 8, is a perspective view of one of the axle engagingbrackets 19.

My improved jack comprises a front membenl, and a rear member 2. Thesemembers are of general U-shapc preferably composed of horizontal andvertical pipe sections 3 and t connected by pipe angles 5. The verticalpipe sections 4 constitute the lower members of uprights, the uppermembers (3 telescoping in the lower members and secpred at variousadjustments by pins 7 which are projected through openings 8 in lowermembers 4, and in any of a series of openings 9 in upper members 6.

The pins 7 are connected to the uprights by flexible devices 10 toprevent their loss when the parts are separated. A collar 11 is clampedto the intermediate portion of pipes 8 on front member 1, and a chain 12is secured to this collar and is adaptedto engage a hook 13 on a collar14 on rear member 2. This chain is of sufiicient length to allow of awide range of adjustment, so that the members maybe positioned anydesired distance apart by connecting the desired link of the chain withhook 1.3.

Collars 15 are screwed onto the upper members of the rear uprights, andT-couplings 16 are screwed onto the upper ends of the front uprights.These collars 15 and T-couplings 16 are provided with set screws 17 toclamp the vertical shank portions 18 of angle brackets 19 and 20respectively. These brackets are constructed to engage the front andrear axles and they project toward each other as seen most cl arly inFig. 3.

The T-couplings 16 on front member 1 are connected by pipe 21 whichprojects through the ends 'of an arched bar 22. Chains 23 connect thelower portion of the front member 1 with hooks 24: on a bearing bracket25. This bearing bracket receives a T-coupling 26 into which a pipe 27is screwed. This pipe 27, at its free end, is of reduced diameter asshown at 28, and internally screw-threaded to receive a tubular screw29. This tubular screw 29 is'externally and internally screw-threaded.Its

external screw-threads engage the threads in the restricted end 28 orsleeve 27, while its internal threads which are opposite to the externalthreads, engage the threads of a screw-tlu'eaded rod 30 secured to bar22.

A toothed wheel 31 is secured to the tubular screw 21) at its free end,and is engaged by a spring-pressed detent or dog 32 carried by a lever33. The lever 33 has a heal:- ing 31 mounted to turn upon screw 29, andheld against longitudinal movement on the screw by means of a collar 35,the latter held in place by a set screw 36. This position of the leverallows it an oscillating movement on the screw 29, and as thespripgbracket.

pressed detent has a beveled lower end, it is free to ride over theteeth of wheel. 31 when the lever is swung in one direction, and compelthe wheel and screw to turn therewith when moved in the other direction.It will thus be noted that as the tubular screw 29 is turned in onedirection, it will cause the screw-threaded rod. 30 to move out of thetubular screw 29-, and the latter to move out of the pipe 27 to lengthenthe prop which consists of ha r 22-,screw 50, tubular screw 2!), sleeve27 and T-coupling 26.

The spring-pressed detent 32 has rotary mounting in the lever, and isprovided with a pin 37 which is adapted to be swung around from side toside and positioned in recessed lugs 88. This moven'ient of the detentallows it to engage the teeth in one direction, and ride over them inthe other, and permits the lever to be operated to lengthen and shortenthe prop as will be understood.

In operation, the parts are placed in the osition shown in Fig. 1. Thatis, the prop is reduced in length and its T-coupling 26 is outside ofbearing bracket 25. The front and rear members 1 and 2 are lying flatupon the ground, and the vehicle 39 illustrated in dotted lines may thenbe run into position over the jack. The next step is to place the partsin the position shown in Fig. 2, namely, the front and rear members arepositioned at an incline with their brackets 19 and 20 engaging theaxles of the vehicle and the prop is positioned with its T- coupling 26in the bearing bracket 25. The chain 12-, is of course connected to thehook 13, and when in this position, the operator oscillates lever tolengthen the prop and force the front upright to a vertical position.This movement of the front upright causes the rear upright to assume thesame angle, because of the vehicle which acts as a connecting mediumbetween the members, and because the chain 13 prevents any movement ofthe lower portion of the rear In other words, the movement of thefrontbracket imparts a like movement to the rear bracket, and bothmembers may be raised to a vertical position as shown in Fig. 3 tosupport the vehicle off the ground. When it is desired to lower thevehicle, the detent 32 is reversed and the prop gradually shortened, soas to slowly lower the vehicle onto the ground.

When the device is not in use, the several parts may be disconnected andpacked into small space and carried with the vehicle if desired.

Various slight changes might be made in the general form and arrangementof parts described without departing from my invention, and hence I donot limit myself to the precise details set forth, but consider myselfat liberty to make such changes and alterations as fairly fall withinthe spirit and scope of the appended claims.

llaving thus described my invention, what I claim as new and desire tosecure by Lettors Patent is:

l. A frame consistin of top, bottom and. end bars, the ends bars havingaxle supporting fingers and the bottom bar a hook in combination, andanother frame consisting of top, bottom. and end bars, the end barshaving axle supports and the bottom bar a pin in COlTllJlllhtlOIl with achain fastened to the hook and pin.

2. The combination of two frames, each consisting of top, bottom and endbars, and having on the end bars clamps and axle supporting fingers heldto the end bars by the clamps, and one frame having a hook and the othera pin, with a chain fastened to the hook and pin.

3. A frame consisting of top, bottom and end bars, the end bars havingaxle supporting fingers and the bottom bar a-hook in combination, andanother frame consisting of top, bottom and end bars, the end barshaving axle supports and the bottom bar a pin in combination with achain fastened to the hook and pin, a jack support, a chain connectingthe jack support with the bottom bar of one of said frames, nd a jackconnected to said lastqnentiofied frame and adapted to be positioned inthe support, substantially as described.

4. The combination of two frames, each consisting 'of top, bottom andend bars, and having on the end bars clamps and axle su porting lingersheld to the end bars by t e clamps, and one frame having a hook and theother a pin, with a chain fastened to the hook and pin, a jack support,a chain connecting the jack support with the bottom bar of one of saidframes, and a jack connected to said last-mentioned frame and adapted tobe positioned in the support, substantially as described.

A frame consisting of top, bottom and end bars, the end bars having axlesupporting fingers and the bottom bar a hook in combination, and anotherframe consisting of top, bottom and end bars, the end bars having axlesupports and the bottom bar a pin in combination with a chain fastenedto the hook and pin, a jack support, a chain connecting, the jacksupport with the bottom bar of. one of said frames, and a jack connectedto said last-mentioned frame and adapted to be positioned in thesupport, said jack comprising, two threaded members movablelmigitudiually with relation to each other, a ratchet wheel connected toone me1nher, a lever constructed to oscillate on the other of saidmembers, and a dog on the lever constructed to engage the toothed wheel,substantially as described.

Ltd

iao

6. The combination of two frames, each consisting of top, bottom and endbars, and having on the end bars clamps and axle supporting fingers heldto the end bars by the clamps, and one frame having a hook and the othera pin, with a chain fastened to the hook and pin, a jack support, achain connecting the jack support with the bottom bar of one of saidframes, and a jack connected to said last-mentioned frame and adapted tobe positioned in the support, said jack comprising two threaded membersmovable longitudinally with relation to each other, a ratchet wheelconnected to one member, a lever constructed to oscillate on 5 the otherof said members, and a dog on the lever constructed to engage thetoothed wheel, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of n two subscribing Witnesses.

J OSEPH DE HAVEN BUNN.

\Vitnesses HENRY S. WIKEL, HARVEY C. HUMMEL.

